Fix asset caching

Closes #623

ppb/assetlib.py

@@ -277,13 +277,11 @@ def __new__(cls, name):
         try:
             return _asset_cache[(clsname, name)]
         except KeyError:
-            inst = super().__new__(cls)
-            _asset_cache[(clsname, name)] = inst
-            return inst
-
-    def __init__(self, name):
-        self.name = str(name)
-        self._start()
+            self = super().__new__(cls)
+            self.name = str(name)
+            _asset_cache[(clsname, name)] = self
+            self._start()
+            return self
 
     def __repr__(self):
         return f"<{type(self).__name__} name={self.name!r}{' loaded' if self.is_loaded() else ''} at 0x{id(self):x}>"

ppb/systems/sound.py

@@ -28,6 +28,7 @@ class Sound(assetlib.Asset):
     # This is wrapping a ctypes.POINTER(Mix_Chunk)
 
     def background_parse(self, data):
+        print("Sound.background_parse", repr(self), flush=True)
         file = rw_from_object(io.BytesIO(data))
         # ^^^^ is a pure-python emulation, does not need cleanup.
         return mix_call(
@@ -84,6 +85,7 @@ def allocated_channels(self, value):
         mix_call(Mix_AllocateChannels, value)
 
     def __enter__(self):
+        print("SoundController.__enter__", repr(self), flush=True)
         super().__enter__()
         mix_call(
             Mix_OpenAudio,